Casa Passiva, Mariano Comense, Italy


Something completely new and innovative with regard to ecological technology and domestic comfort – that was the central idea around which the “passive house” in Mariano Comense, a small town near Lake Como in the region of Lombardy, was built. At the same time, this project was a great challenge to all those involved in its planning, because it was unique with regard to energy efficiency and energy saving. At the start of the planning phase, there were as yet no buildings of this kind in Lombardy – and therefore no reference data.


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  • Maximum yield, thanks to highly efficient full-surface copper absorbers
  • Maximum energy efficiency – corresponds to Energy Class A
  • Long lifetime


  • Self-supporting collector housing with closed aluminium tray
  • Hydraulically optimised modules, mounted vertically or horizontally
  • Simple transportation and easy installation through low weight of modules
  • Long-lived and reliable, made of high-quality components


  • Energy requirement lowered to approx. 10 kWh per m2 per year
  • Heavy reduction in general energy costs
  • Significant lowering of the CO2 emissions
  • Short “running warm” time; no wastage of water